Well I've finally got an image out of PixInsight ! It's pretty poor but it's a start. M81 shot with SW72ED, HEQ5 Pro, 600D modded but had OWB white balance filter in (whoops), No guiding, 100 sixty second lights used from 145, 25 darks, 25 flats, 25 bias. All manually ! processed and stacked. Watched loads of YT, been reading Inside PixInsight and following IP4AP, so much to learn !